Home / 398,272.20-597,408.30-319,540.20

Finding the Fourth Proportional to 398,272.20, 597,408.30 and 319,540.20

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Solution

The fourth proportional to 398,272.20, 597,408.30 and 319,540.20 is: 479,310.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,272.20 : 597,408.30 = 319,540.20 : x
  2. Step 2: Convert to fraction form
    398,272.20/597,408.30 = 319,540.20/x
  3. Step 3: Cross multiply
    398,272.20x = 597,408.30 × 319,540.20
  4. Step 4: Simplify right side
    398,272.20x = 190,895,967,663.66
  5. Step 5: Solve for x
    x = 190,895,967,663.66/398,272.20
  6. Step 6: Final answer
    x = 479,310.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.